WO2016080623A1 - Dispositif de protection contre les chocs électriques et dispositif électronique portatif le comprenant - Google Patents

Dispositif de protection contre les chocs électriques et dispositif électronique portatif le comprenant Download PDF

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Publication number
WO2016080623A1
WO2016080623A1 PCT/KR2015/007120 KR2015007120W WO2016080623A1 WO 2016080623 A1 WO2016080623 A1 WO 2016080623A1 KR 2015007120 W KR2015007120 W KR 2015007120W WO 2016080623 A1 WO2016080623 A1 WO 2016080623A1
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WIPO (PCT)
Prior art keywords
electric shock
shock protection
protection device
internal electrodes
electronic device
Prior art date
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PCT/KR2015/007120
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English (en)
Korean (ko)
Inventor
유준서
박규환
김동기
선귀남
류재수
임병국
김리언
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주식회사 아모텍
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Application filed by 주식회사 아모텍 filed Critical 주식회사 아모텍
Publication of WO2016080623A1 publication Critical patent/WO2016080623A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007—Casings
    • H05K9/0049—Casings being metallic containers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1656—Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0067—Devices for protecting against damage from electrostatic discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/0203—Particular design considerations for integrated circuits
    • H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection
    • H01L27/0251—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices
    • H01L27/0288—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices using passive elements as protective elements, e.g. resistors, capacitors, inductors, spark-gaps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
    • H02H9/046—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere responsive to excess voltage appearing at terminals of integrated circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0254—High voltage adaptations; Electrical insulation details; Overvoltage or electrostatic discharge protection ; Arrangements for regulating voltages or for using plural voltages
    • H05K1/0257—Overvoltage protection

Definitions

  • the present invention relates to an electric shock protection device and a portable electronic device having the same, and more particularly, an electric shock protection device capable of protecting a user from leakage current by a power supply and protecting an internal circuit from external static electricity. It relates to a portable electronic device.
  • the metal housing has excellent electrical conductivity due to the characteristics of the material, an electrical path may be formed between the external housing and the internal circuit part through a specific device or according to a portion thereof.
  • the metal housing and the circuit part form a loop, when a static electricity having a high voltage is momentarily introduced through a conductor such as a metal housing having a large external exposed area, the circuit part such as an IC may be damaged. Measures are required.
  • Such a portable electronic device typically uses a charger to charge the battery.
  • a charger rectifies external AC power to DC power, and then converts it into a low DC power supply suitable for portable electronic devices through a transformer.
  • a Y-CAP composed of a capacitor across the transformer.
  • the DC power may not be sufficiently cut off by the Y-CAP, and furthermore, a leakage current may be generated by the AC power. It can propagate along the ground of the circuit.
  • This leakage current can also be transmitted to a conductor that can be contacted by the human body, such as an external case of a portable electronic device. As a result, the user can feel a nasty feeling of discomfort. I can wear it.
  • a portable electronic device such as a mobile phone employing a metal case is required to protect the user from such leakage current.
  • the present invention has been made in view of the above, and an object thereof is to provide an electric shock protection device capable of protecting an internal circuit and / or a user from leakage current caused by static electricity or an external power source and a portable electronic device having the same. have.
  • the present invention provides an electric shock protection device disposed between the human body contactable conductor of the electronic device and the built-in circuit portion.
  • the electric shock protection device satisfies the following equation to allow the static electricity to pass through the static electricity when the static electricity flows from the conductor, without blocking the leakage current of the external power flowing from the ground of the circuit portion:
  • Vbr is the breakdown voltage of the electric shock protection device
  • Vin is the rated voltage of the external power source of the electronic device.
  • the rated voltage may be a standard rated voltage for each country.
  • the electric shock protection device the body in which a plurality of sheet layers are laminated; At least a pair of internal electrodes spaced apart from each other by a predetermined interval inside the body; And a gap formed between the internal electrodes.
  • the pair of internal electrodes may be disposed on the same plane.
  • the air gap may be provided with a discharge material layer applied to a predetermined thickness in the height direction on the inner wall.
  • the gap may be provided in plurality between the pair of internal electrodes.
  • the discharge material layer may be made of a non-conductive material or a semiconductor material including metal particles.
  • the discharge material layer includes a first portion applied along the inner wall of the void, a second portion extending outward from the top of the first portion and a third portion extending outward from the bottom of the first portion.
  • the second portion may be in contact with one of the pair of internal electrodes
  • the third portion may be in contact with another one of the pair of internal electrodes.
  • the body may be made of an insulator having a dielectric constant.
  • the internal electrode may include any one or more components of Ag, Au, Pt, Pd, Ni, Cu.
  • the electric shock protection device may further include at least two varistor material layers in which a first varistor material layer and a second varistor material layer are alternately stacked; A plurality of first internal electrodes spaced apart at predetermined intervals (L) on the first varistor material layer; And a plurality of second internal electrodes spaced apart at predetermined intervals L on the second varistor material layer.
  • the breakdown voltage Vbr may be formed between the first inner electrode and the second inner electrode which are closest to each other.
  • each of the first internal electrode and the second internal electrode may be disposed to overlap at least a portion thereof.
  • each of the first internal electrode and the second internal electrode may be disposed not to overlap each other.
  • the separation distance L of the first internal electrode or the second internal electrode is the shortest distance d1 between the first internal electrode and the second internal electrode and the shortest distance between the neighboring second internal electrodes. It may be greater than the sum of (d2).
  • first varistor material layer and the second varistor material layer may be a semiconducting material including at least one of ZnO, SrTiO 3 , BaTiO 3 , and SiC, or Pr and Bi-based materials.
  • the present invention is a human body contactable conductor; Circuit section; And it provides a portable electronic device having an electric shock protection function including an electric shock protection element disposed between the conductor and the circuit portion.
  • the electric shock protection device passes the static electricity without insulation breakdown when static electricity flows from the conductor, and satisfies the following equation to cut off the leakage current of external power flowing from the ground of the circuit portion:
  • Vbr is the breakdown voltage of the electric shock protection device
  • Vin is the rated voltage of the external power source of the electronic device.
  • the conductor may include at least one of an antenna, a metal case, and conductive jewelry for communication between the electronic device and an external device.
  • the metal case may be provided to partially surround or entirely surround the side of the housing of the electronic device.
  • the metal case may be provided to surround the camera provided to the outside of the front or rear of the housing of the electronic device.
  • the present invention provides a device disposed between the human body contactable conductor of the electronic device and the embedded circuit portion.
  • the electric shock protection unit for passing the static electricity without breaking the insulation when the static electricity flows from the conductor and cuts the leakage current of the external power flowing from the ground of the internal circuit portion, satisfies the following equation:
  • Vbr is the breakdown voltage of the electric shock protection device
  • Vin is the rated voltage of the external power source of the electronic device.
  • the electric shock protection unit may include: a body in which a plurality of sheet layers are stacked; At least a pair of internal electrodes spaced apart from each other by a predetermined interval inside the body; And a gap formed between the internal electrodes.
  • the electric shock protection unit may include at least two varistor material layers in which a first varistor material layer and a second varistor material layer are alternately stacked; A plurality of first internal electrodes spaced apart at predetermined intervals (L) on the first varistor material layer; And a plurality of second internal electrodes spaced apart at predetermined intervals L on the second varistor material layer.
  • an electric shock protection device and a portable electronic device having the same by providing an electric shock protection device for connecting a conductor and a circuit part in a portable electronic device in which a conductor such as a metal case is exposed to the outside, There is an advantage that can protect the user and the internal circuit from leakage current and static electricity by.
  • FIG. 1 is a configuration diagram schematically showing an electric shock protection device according to an embodiment of the present invention.
  • FIGS. 2A and 2B are conceptual views illustrating an application example of an electric shock protection device according to an embodiment of the present invention.
  • 3A and 3B are schematic equivalent circuit diagrams for explaining operations of (a) leakage current and (b) electrostatic discharge (ESD) of an electric shock protection device according to an embodiment of the present invention.
  • FIGS. 4A to 4C are views showing an example of an electric shock protection device according to an embodiment of the present invention.
  • 5A to 5C are diagrams illustrating another example of the electric shock protection device according to the embodiment of the present invention.
  • FIGS. 6A to 6D are views illustrating still another example of the electric shock protection device according to the embodiment of the present invention.
  • the electric shock protection device 100 may be disposed between the human body contactable conductor 12 and the internal circuit unit 14 of the electronic device.
  • the electric shock protection device 100 passes the static electricity without insulation breakdown when static electricity flows from the conductor 12, and satisfies the following equation to block leakage current of external power flowing from the ground of the circuit unit 14. It can have a breakdown voltage (Vb) to:
  • Vin is the rated voltage of the external power source of the electronic device.
  • the rated voltage may be a standard rated voltage for each country, and for example, may be any one of 240V, 110V, 220V, 120V, 110V, and 100V.
  • the electric shock protection device 100 may be a varistor or a suppressor.
  • the breakdown voltage Vbr refers to the breakdown voltage (or trigger voltage) of the varistor or the suppressor, and the interval between the internal electrodes of the varistor or the suppressor. , The area of the internal electrodes overlapping each other, the dielectric constant of the stacked sheet layers, the pore volume between the internal electrodes, and the discharge material layer, the particle diameter of the varistor material, and the number of internal electrodes connected in series.
  • the electric shock protection device 100 may be disposed between the conductor 12, such as an outer metal case, and the circuit unit 14 in the portable electronic device 10.
  • the portable electronic device 10 may be in the form of a portable electronic device that is portable and easy to carry.
  • the portable electronic device may be a mobile terminal such as a smart phone or a cellular phone, and may be a smart watch, a digital camera, a DMB, an e-book, a netbook, a tablet PC, a portable computer, or the like.
  • Such electronics may have any suitable electronic components including antenna structures for communication with an external device.
  • the device may be a device using local area network communication such as Wi-Fi and Bluetooth.
  • Such a portable electronic device 10 is an outer housing made of conductive materials such as metal (aluminum, stainless steel, etc.), or carbon-fiber composite materials or other fiber-based composites, glass, ceramic, plastic, and combinations thereof. It may include.
  • the housing of the portable electronic device 10 may include a conductor 12 made of metal and exposed to the outside.
  • the conductor 12 may include at least one of an antenna, a metal case, and conductive ornaments for communication between the electronic device and an external device.
  • the metal case may be provided to partially or entirely surround the side of the housing of the portable electronic device 10.
  • the metal case may be provided to surround the camera provided to the outside of the front or rear of the housing of the electronic device.
  • the electric shock protection device 100 may be disposed between the human body contactable conductor 12 of the portable electronic device 10 and the circuit unit 14 to protect the internal circuit from leakage current and static electricity.
  • Such an electric shock prevention device 100 may be appropriately provided according to the number of metal cases provided in the housing of the portable electronic device 10. However, when a plurality of metal cases are provided, each of the metal cases 12a, 12b, 12c, and 12d may be embedded in the housing of the portable electronic device 10 so that the electric shock prevention devices 100 are individually connected. have.
  • the conductor 12 such as a metal case surrounding the side of the housing of the portable electronic device 10 has three parts
  • the respective conductors 12a, 12b, 12c, and 12d are Both are connected to the electric shock prevention device 100 to protect the circuitry inside the portable electronic device 10 from leakage current and static electricity.
  • the electric shock prevention device 100 may be provided in various ways according to the corresponding roles of the metal cases 12a, 12b, 12c, and 12d. have.
  • the electric shock prevention device 100 when the camera 100 is exposed to the outside of the housing of the portable electronic device 10 when the electric shock prevention device 100 is applied to the conductor 12d surrounding the camera, the electric shock prevention device 100 ) May be provided in the form of blocking leakage current and protecting the internal circuit from static electricity.
  • the electric shock prevention device 100 may be connected to the metal case 12b to block leakage current and protect an internal circuit from static electricity. .
  • the electric shock protection device 100 may be disposed between the metal case 12 ′ and the circuit board 14 ′.
  • the circuit board 14 ′ may include a separate protection device 16 for bypassing static electricity to ground.
  • the protection element 16 may be a suppressor or a varistor.
  • the electric shock protection device 100 may have different functions according to leakage current by external power and static electricity flowing from the conductor 12.
  • the electric shock protection device 100 when the leakage current of the external power supply to the conductor 12 through the circuit board, for example, the ground of the circuit portion 14, the electric shock protection device 100 is in an open state Can be maintained. That is, since the breakdown voltage Vbr of the electric shock protection device 100 is greater than the rated voltage of the external power supply of the portable electronic device, the electric shock protection device 100 can maintain the open state without being electrically connected. As a result, the electric shock protection device 100 may protect the user from electric shock by cutting off leakage current by external power introduced from the ground of the circuit unit 14.
  • the electric shock protection device 100 when static electricity flows from the outside through the conductor 12, the electric shock protection device 100 functions as an electrostatic protection device such as a suppressor or a varistor. That is, since the breakdown voltage Vbr of the varistor is smaller than the instantaneous voltage of the static electricity when the varistor is a varistor, the electric shock protection device 100 is electrically conductive to allow static electricity to pass through. Since the operating voltage is smaller than the instantaneous voltage of the static electricity, static electricity can be passed by the instant discharge. As a result, the electric shock protection device 100 may lower the electrical resistance when the static electricity flows from the conductor 12, and thus may pass static electricity without breaking the insulation itself.
  • the circuit unit 14 may include a separate protection device for bypassing static electricity to ground.
  • the electric shock protection device 100 may pass the static electricity without insulation destruction by the static electricity flowing from the conductor 12, thereby protecting the internal circuit of the rear end.
  • the electric shock protection device may be a suppressor 200 as shown in FIGS. 4A to 4C.
  • the suppressor 200 includes a body 210, internal electrodes 211a and 212a and a pore forming member 215.
  • At least one pair of sheet layers 211, 212 and 213 are sequentially stacked, and the body 210 is formed to be integrally formed by pressing and sintering processes after the internal electrodes 211a and 212a provided on one surface thereof are disposed to face each other. do.
  • the body 210 may be made of an insulator having a dielectric constant.
  • the insulator may be made of ceramic material, low temperature sintered ceramic (LTCC), high temperature sintered ceramic (HTCC) and magnetic material.
  • the ceramic material is a metal oxide compound
  • the metal oxide compound is Er 2 O 3 , Dy 2 O 3 , Ho 2 O 3 , V 2 O 5 , CoO, MoO 3 , SnO 2 , BaTiO 3, Nd 2 O 3 It may include one or more selected.
  • the internal electrodes 211a and 212a may be formed to be spaced apart from each other within the body 210 by at least one pair.
  • the first internal electrode 211a and the second internal electrode 212a may be electrically connected to the external electrodes 231 and 232 provided at both ends of the body 210, respectively.
  • the internal electrodes 211a and 212a may include any one or more components of Ag, Au, Pt, Pd, Ni, and Cu, and the external electrodes 231 and 232 may include any one or more of Ag, Ni, and Sn components. can do.
  • the internal electrodes 211a and 212a may be provided in various shapes and patterns, and the first internal electrode 211a and the second internal electrode 212a may be provided in the same pattern or may have different patterns. May be That is, the internal electrodes 211a and 212a are not limited to a specific pattern if the first internal electrode 211a and the second internal electrode 212a are disposed so as to overlap each other when the body 210 is configured.
  • the interval between the internal electrodes 211a and 212a and the areas facing each other or the lengths overlapping each other may be configured to satisfy the breakdown voltage Vbr of the suppressor 200.
  • the internal electrodes The spacing between 211a and 212a may be 10 to 100 ⁇ m.
  • a protection sheet layer 213 is disposed between the pair of electrodes 211a and 212a corresponding to each other to protect static electricity and to protect the circuit protection device and the peripheral circuits from overvoltage.
  • the protective sheet layer 213 is provided with at least one pore-forming member 215 formed in a hollow form between the pair of internal electrodes 211a and 212a. To this end, the protective sheet layer 213 may have a through hole 214 formed at a position where the pore forming member 215 is provided.
  • the body 210 has a first sheet layer 211 having a first internal electrode 211a on an upper surface thereof, and a second sheet layer having a second internal electrode 212a on a lower surface thereof. 212 are stacked on each other, and a protective sheet layer 213 is disposed between the first sheet layer 211 and the second sheet layer 212.
  • first sheet layer 211, the protective sheet layer 213, and the second sheet layer 212 are sequentially stacked so that the first internal electrode 211a and the second internal electrode 212a face each other. do.
  • the first internal electrode 211a and the second internal electrode 212a are disposed to face each other, and are spaced apart from each other by the protective sheet layer 213, and the first internal electrode 211a is disposed. And one side of the second internal electrode 212a in contact with the pore-forming member 215, respectively.
  • At least one through hole 214 is formed through the protective sheet layer 213 as illustrated in FIG. 4C.
  • the through hole 214 is formed so that the first inner electrode 211a and the second inner electrode 212a disposed on the upper and lower portions of the protective sheet layer 213 overlap each other. do.
  • the through hole 214 may be provided with a pore forming member 215.
  • the pore forming member 215 may be disposed between the internal electrodes 211a and 212a and may include discharge material layers 125a, 125b and 125c coated on the inner wall with a predetermined thickness along the height direction.
  • a discharge material layer may be applied to the inner wall of the through hole 214 at a predetermined thickness along the height direction.
  • the pore forming member 215 or the discharge material layer applied thereto may be provided such that an upper end thereof contacts the second internal electrode 212a and a lower end thereof contacts the first internal electrode 211a.
  • the pore 216 may be formed between the pair of internal electrodes 211a and 212a by the pore forming member 215. Static electricity introduced from the outside by the pores 216 may be discharged between the internal electrodes 211a and 212a. At this time, the electrical resistance between the internal electrodes 211a and 212a is lowered, and the voltage difference across the electric shock protection device 100 can be reduced to a predetermined value or less. Therefore, the suppressor 120 may pass static electricity without breaking the insulation.
  • the discharge material constituting the discharge material layers 125a, 125b, and 125c should have a low dielectric constant, no conductivity, and no short (short) when overvoltage is applied.
  • the discharge material may be made of a non-conductive material including at least one kind of metal particles, and may be made of a semiconductor material including SiC or silicon-based components.
  • the discharge material is made by mixing at least one material selected from SiC, carbon, graphite, and ZnO with at least one material selected from Ag, Pd, Pt, Au, Cu, Ni, W, and Mo at a predetermined ratio. It may be.
  • the discharge material may include a SiC-ZnO-based component.
  • Silicon carbide (SiC) component has excellent thermal stability, excellent stability in an oxidizing atmosphere, constant conductivity and thermal conductivity, and low dielectric constant.
  • the ZnO component has excellent nonlinear resistance characteristics and discharge characteristics.
  • SiC and ZnO are both conductive when used separately, but when the mixture is fired after mixing with each other, ZnO is bonded to the surface of the SiC particles to form an insulating layer that is a low non-conductive material.
  • the insulating layer blocks the Ag pass to provide higher insulation to the discharge material, and improves resistance to static electricity, thereby solving the DC short phenomenon when the suppressor 120 is mounted on the electronic component.
  • the discharge material has been described as including a SiC-ZnO-based component, but is not limited thereto.
  • the discharge material may be a component constituting the first internal electrode 211a and the second internal electrode 212a.
  • Non-conductive materials including semiconducting materials or metal particles can be used.
  • the discharge material layers 215a, 215b, and 215c applied to the inner wall of the pore forming member 215 may include a first portion 215a and the first portion (coated along the inner wall of the pore forming member 215).
  • the third part 215c may extend along the lower surface of the sheet layer 213 to be in contact with the second internal electrode 212a.
  • the discharge material layers 215a, 215b, and 215c are formed on the second and second portions 217b and 3rd from the upper and lower ends of the pore forming member 215 as well as the inner wall of the pore forming member 215.
  • 217c is formed to extend so that the contact area with the first internal electrode 211a and the second internal electrode 212a can be widened.
  • the protective sheet layer 213 may be provided with a plurality of pore forming member 215. As such, when the number of the pore forming members 215 is increased, the discharge path of the static electricity is increased, thereby increasing the resistance to static electricity.
  • the protective sheet layer 213 disposed between the first sheet layer 211 and the second sheet layer 212 may be provided to have the same area as the first sheet layer 211 and the second sheet layer 212.
  • the first internal electrode 211a and the second internal electrode 212a corresponding to each other include an overlapping area and have a smaller area than the first sheet layer 211 and the second sheet layer 212. It may be possible.
  • the suppressor 200 configured as described above is kept in an open state, thereby providing a metal case. It can block the transfer to the human body contactable conductor 12, such as.
  • the electric shock protection device may be a suppressor 300 as illustrated in FIGS. 5A to 5C.
  • the suppressor 300 may be formed between the internal electrodes 314a and 314b without using a separate pore forming member.
  • the sidewall of the gap 320 may include a discharge material layer 324.
  • the suppressor 300 may include a pair of internal electrodes 314a and 314b horizontally spaced apart from each other by a predetermined interval.
  • the gap 320 may be formed between the pair of internal electrodes 314a and 314b.
  • the gap 320 may be formed to have a height greater than the height of the pair of internal electrodes 314a and 314b, and may be formed to have a width larger than the gap of the pair of internal electrodes 314a and 314b.
  • the internal electrodes 314a and 314b are spaced apart from each other to form voids in the body composed of at least one pair of sheet layers 311, 312 and 313.
  • the pair of internal electrodes 314a and 314b are spaced apart at regular intervals in a parallel direction on the same plane.
  • the pair of internal electrodes 314a and 314b are spaced apart from each other to form a gap d on an upper surface of the first sheet layer 111.
  • the gap d between the pair of internal electrodes 314a and 314b may be 10 to 100 ⁇ m.
  • the pair of internal electrodes 314a and 314b are pattern printed on the top surface of the first sheet layer 111.
  • a gap 320 is provided between the pair of internal electrodes 314a and 314b corresponding to each other to protect static electricity, protect the circuit protection device and peripheral circuits from overvoltage, and block leakage current.
  • the void 320 is disposed between the pair of internal electrodes 314a and 314b arranged parallel to each other on the same plane, and is provided in a hollow shape so as to fill an air, and an open upper portion of the void 320.
  • the second sheet layer 312 is stacked on the side.
  • a plurality of such gaps 320 may be provided to be spaced apart along the width direction of the internal electrodes 314a and 314b. As such, when the number of the voids 320 is increased, the discharge path of the static electricity is increased, thereby improving resistance to static electricity.
  • the gap 320 is formed to have a height h that exceeds the height from the upper surface of the first sheet layer 111 to the upper ends of the internal electrodes 314a and 314b. That is, the void 320 according to an embodiment of the present invention is provided to have a height that exceeds the height of the internal electrodes 314a and 314b so that the volume of the entire void 320 can be expanded.
  • the gap 320 includes a first portion 322a having the same height as the internal electrodes 314a and 314b and a second portion 322b extending a predetermined height from an upper end of the first portion 322a. do.
  • the second portion 322b of the gap 320 is provided to extend on the upper surface of at least one of the pair of internal electrodes 314a and 314b spaced apart from each other. It may extend to the upper surface of the pair of internal electrodes (314a, 314b).
  • the void 320 includes a third portion extending downwardly from the lower end of the first portion 322a by a predetermined height, and the third portion is formed on the lower surfaces of the internal electrodes 314a and 314b. It may be provided in an extended form.
  • the void 320 is formed by removing the void material by heat applied in the sintering process after the void material is pattern-printed in the gap d.
  • the pore 320 in order to prevent the pore 320 from being deformed or damaged by pressure in the process of compressing the pore material after stacking the first sheet layer 311 and the second sheet layer 312 to form a body, Used.
  • the pore material is made of a material that can be decomposed by high temperature heat so that it can be removed in the process of laminating a plurality of sheet layers and firing.
  • the pore material may be made of a material that is decomposed in the temperature range between 200 ⁇ 2000 °C.
  • the pair of internal electrodes 314a and 314b may be provided in a bar shape having a rectangular cross section, as shown in FIG. 5C, but is not limited thereto, and may be provided in various shapes and patterns. They may be provided in the same pattern or may be provided to have different patterns.
  • a gap d is formed between the ends of the pair of internal electrodes 314a and 314b facing each other, and the gap 320 is provided in the gap d.
  • the inner wall of the gap 320 is provided with a discharge material layer 324 applied to a predetermined thickness along the height direction of the internal electrodes (314a, 314b).
  • the discharge material layer 324 may be provided only on the inner wall of the void 320, it will be appreciated that it may be applied to cover the open upper portion of the void 320. That is, the discharge material layer 124 may extend by connecting the open upper end of the void 320 as well as the inner wall of the void 320.
  • the first sheet layer 111 and the second sheet layer 312 constituting the body although the second sheet layer 312 may be directly stacked on top of the first sheet layer 111, the first A pair of internal electrodes 314a and 314b formed on the top surface of the sheet layer 111 and a separate buffer layer 113 corresponding to the height of the gap 320 may be stacked.
  • the buffer layer 113 serves to eliminate the height deviation corresponding to the height of the internal electrodes 314a and 314b and the height of the gap 320.
  • the electric shock protection device may be a varistor 400 as shown in FIGS. 6A to 6D.
  • the varistor 400 includes varistor material layers 410 and 420 and a plurality of internal electrodes 412, 412 ′ and 422.
  • the varistor material layer may include at least two layers of the first varistor material layer 410 and the second varistor material layer 420.
  • the first varistor material layer 410 and the second varistor material layer 420 may be a semiconducting material including at least one of ZnO, SrTiO 3 , BaTiO 3 , and SiC, or any one of Pr and Bi-based materials. Can be.
  • the internal electrodes are spaced apart at a predetermined interval L on the first varistor material layer 410 by a plurality of first internal electrodes 412 and 412 'spaced apart at a predetermined interval L by the second varistor material layer 420.
  • the plurality of second internal electrodes 422 may be included.
  • the breakdown voltage Vbr of the varistor 400 may be the sum of the unit breakdown voltages formed between the closest first internal electrodes 412 and 412 'and the second internal electrode 422, respectively. That is, the breakdown voltage Vbr of the varistor 400 is a unit breakdown voltage formed between the first internal electrodes 412 and 412 'and the second internal electrode 422, and the first internal electrodes 412 and 412 formed in series. ') And the number of second internal electrodes 422 may be determined.
  • Each of the first internal electrodes 412 and 412 ′ and the second internal electrodes 422 may be disposed so that at least a portion thereof does not overlap. That is, each of the first internal electrodes 412 and 412 ′ and the second internal electrodes 422 may be alternately arranged to overlap at least a portion of the first internal electrodes 412 and 412 ′, or may be arranged to cross each other so as not to overlap each other.
  • the first internal electrode or the second internal electrode does not leak static electricity or leakage current to the adjacent external electrodes (not shown) of the internal electrodes 412, 412 ′, and 422, and between the internal electrodes 412, 412 ′, 422. It is preferable that the interval is set so that it can proceed normally.
  • the separation distance L between one first internal electrode 412 and 412 'and a neighboring second internal electrode 422 is defined by the first internal electrode 412 and 412' and the second internal electrode 422.
  • the sum is greater than the sum of the shortest distance d1 between the second shortest distance d2 between the neighboring second internal electrodes 422.
  • the second internal electrode 422 may be formed such that a distance from an adjacent external electrode (not shown) is greater than a separation interval between the first internal electrodes 412 and 422.
  • the first varistor material layer 410 may be provided with two first internal electrodes 412 and 412 ', and the two first internal electrodes 412 and 412' may be spaced apart from each other on the same plane. Can be arranged.
  • the second varistor material layer 420 may include a second internal electrode 422 on one surface thereof.
  • the first varistor material layer 410 and the second varistor material layer 420 may be spaced apart from each other in the vertical direction by the second internal electrodes 422 and the two first internal electrodes 412 and 412 '. Laminated in the up and down directions to be arranged.
  • the second internal electrodes 422 may be disposed such that both end sides thereof may overlap a predetermined region with one end sides of the two first internal electrodes 412 and 412 ′. To this end, a central portion of the second internal electrode 422 may be disposed at a central portion of the gap L1 formed between the two first internal electrodes 412 and 412 '.
  • the first varistor material layer 410 in which the two first internal electrodes 412 and 412 ′ are formed may include the second varistor material layer in which one second internal electrode 422 is formed.
  • the stack may be stacked on top of the 420 and, optionally, stacked below the second varistor material layer 420.
  • the number of the first internal electrodes 412 and 412 ′ and the second internal electrodes 422 to satisfy the breakdown voltage Vbr of the varistor 400 may be determined according to the unit breakdown voltage formed therebetween. That is, in FIGS. 6A to 6D, two unit devices formed by the first internal electrodes 412 and 412 ′ and the second internal electrode 422 are described. However, the present invention is not limited thereto, and the plurality of unit devices is not limited thereto. It can be formed as.
  • the varistor 400 ′ has two first varistor material layers 410 and two second internal electrodes 422 formed with two first internal electrodes 412 and 412 ′.
  • One second varistor material layer 420 may be stacked alternately.
  • the two first varistor material layers 410 may be stacked in the form of upper and lower portions of the second varistor material layer 420, respectively.
  • the second internal electrodes 422 formed on the second varistor material layer 420 are formed of the first internal electrodes 412 and 412 'disposed at upper ends thereof and the second internal electrodes 422 disposed below them. It is disposed so as to overlap a predetermined area with one end side.
  • first internal electrodes 412 and 412 'disposed on the second varistor material layer 420 and the first internal electrodes 412 and 412' disposed below the second varistor material layer 420 are disposed on the upper and lower sides.
  • the second internal electrode 422 may be disposed side by side in the direction and between the first internal electrodes 412 and 412 ′ spaced apart in the vertical direction.
  • the center portion of the second inner electrode 422 may be disposed to be positioned at the center portion of the gap L formed between two first inner electrodes 412 and 412 'disposed on the same plane.
  • the first varistor material layer 410 and the second varistor material layer 420 may have a gap d1 and d1 between the first internal electrodes 412 and 412 'and the second internal electrode 422 as described above, or between them. It may be arranged in various stacking order while satisfying the interval (L) of.
  • discharge paths of static electricity may be increased, thereby improving resistance to static electricity.
  • the varistors 400 and 400 since the varistors 400 and 400 'include the first internal electrodes 412 and 412' and the second internal electrodes 422 in the varistor material layer, when the static electricity is applied, the varistors 400 and 400 'may be formed by the nonlinear voltage characteristics of the varistor material. The electrical resistance between 412 and 412 ′ and the second internal electrode 422 is lowered to allow static electricity to pass through. Thus, the varistor material can pass static electricity without being destroyed by instantaneous high static electricity.
  • the breakdown voltage Vbr of the varistors 400 and 400 ' is larger than the overvoltage caused by the leakage current. 12) can be blocked.

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)

Abstract

L'invention concerne un dispositif de protection contre les chocs électriques et un dispositif électronique portatif le comprenant. Un dispositif de protection contre les chocs électriques, selon un mode de réalisation de la présente invention, est placé entre une unité de circuit interne et un conducteur d'un dispositif électronique qui peut venir en contact avec le corps humain, permet de transmettre l'électricité statique sans claquage diélectrique lorsque de l'électricité statique rentre dedans en provenance du conducteur, et, de manière à bloquer un courant de fuite d'une source d'alimentation externe qui rentre dedans en provenance d'une masse de l'unité de circuit, satisfait la formule suivante : Vbr > Vin, Vbr étant la tension de claquage du dispositif de protection contre les chocs électriques et Vin étant la tension nominale de la source d'alimentation externe du dispositif électronique.
PCT/KR2015/007120 2014-11-20 2015-07-09 Dispositif de protection contre les chocs électriques et dispositif électronique portatif le comprenant WO2016080623A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR10-2014-0162863 2014-11-20
KR10-2014-0162808 2014-11-20
KR20140162863 2014-11-20
KR20140162808 2014-11-20
KR1020150094264A KR101608224B1 (ko) 2014-11-20 2015-07-01 감전보호소자 및 이를 구비한 휴대용 전자장치
KR10-2015-0094264 2015-07-01

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US10175727B2 (en) 2019-01-08
KR101608224B1 (ko) 2016-04-14
CN105591360A (zh) 2016-05-18

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